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31.发明专利
公开(公告)号：GB2421875A
公开(公告)日：2006-07-05
申请号：GB0428465
申请日：2004-12-31
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN , LUCAS RICHARD C
Abstract: A mobile communication system (100) includes an infrastructure which includes a plurality of base stations (103, 104), a plurality of mobile stations each of which is operable to communicate with a selected one of the base stations, a mobile terminal (108) operably coupled to at least a first one (106) of the mobile stations and a second one (107) of the mobile stations to provide a communication link to at least one of the base stations, and a mobile controller (110) which is operable to send instruction messages to the mobile stations regarding connectivity with the base stations. The mobile terminal, the mobile controller and the first and second mobile stations may be carried on a moving object such as a person or a vehicle, e.g. train or aeroplane. The mobile controller may make decisions and issue instructions to the mobile stations relating to the base station by which they should each be served with the objective of maintaining a communication link between the mobile terminal and a serving base station via at least one of the mobile stations. Also disclosed are a mobile controller, a mobile station and a method of operation for use in the system.
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32.发明专利
公开(公告)号：GB2414630A
公开(公告)日：2005-11-30
申请号：GB0411699
申请日：2004-05-26
Applicant: MOTOROLA INC
Inventor： PETERSEN STEEN , CHATER-LEA DAVID JOHN
Abstract: In a typical cellular network, when a call is received at a gateway, the gateway will be connected to the HLR (Home Location Register) which allows the call to be routed to a mobile subscriber. In an ad-hoc (e.g. TETRA or private) network however, the network layout may be constantly changing, and so the gateway may not be connected to a HLR which causes a delay in routing the call to a subscriber. This problem is solved by providing a look up table at each node (base station) which holds the location of the node which contains the HLR for each subscriber. Therefore, at each node when a subscriber registers there will be a pointer to the node which contains the HLR for the subscriber. Also, each HLR is assigned a node which has a link to a gateway.
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公开(公告)号：AU2005239608A1
公开(公告)日：2005-11-10
申请号：AU2005239608
申请日：2005-04-24
Applicant: MOTOROLA INC
Inventor： PETERSEN STEEN , FRANDSEN SVEND , THEISEN NANNA SVANE , CHATER-LEA DAVID JOHN
IPC: H04B7/00 , H04L12/28 , H04L12/66 , H04M3/42 , H04N7/16 , H04N7/173 , H04W8/04 , H04W8/06 , H04W8/12
Abstract: A method of controlling location information of subscribers 210, 212, 222 in a wireless, ad-hoc communications network 200. The network 200 comprises a plurality of nodes (base stations) 204, 216, 226 wherein each of the nodes has a Visitor Location Register (VLR) 208, 220, 230 and at least a portion of the nodes are provided with Home Location Registers (HLRs) 206, 218 228. When an operation of a first node 216 is to be reconfigured, for example, due to the addition of a new node or disconnection or movement of the first node 216, at least a part of the records from a first HLR 218 assigned to the first node 216 is transferred to at least one of the other nodes 226 of the network 200. The transfer is preferably controlled by a control unit which selects the target node(s) 226 and creates a back-up copy of the first HLR 218 which can be used if an error occurs during the transfer. Depending on circumstances, all or only part of the HLR records can be transferred and the transferred records can be assigned to a new HLR at the target node(s), which may or may not already have a HLR, or merged with records in a HLR already at the target node(s).
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公开(公告)号：GB2402024B
公开(公告)日：2005-07-13
申请号：GB0311571
申请日：2003-05-19
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
IPC: H04L9/12
Abstract: A processor for encrypting or decrypting information to be communicated from a first location to a second location, the processor being operable in at least two modes including (i) a first mode wherein information is encrypted by an encryption portion of a keystream and a synchronisation indicator is generated in association with each encryption portion and (ii) a second mode wherein information is encrypted by a plurality of encryption portions and a single synchronisation indicator is generated in association with each plurality of encryption portions.
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公开(公告)号：GB2375460B
公开(公告)日：2004-09-29
申请号：GB0111317
申请日：2001-05-09
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
Abstract: Disclosed is a method of operation for use in a radio communications system comprising a cellular network of base stations and mobile units linked to the base stations. The method comprises detecting that a base station has become isolated from the system, wherein the isolated base station has lost at least one link to other base stations but is still in radio communication with its mobile units and changing an output power level of said isolated base station relative to an output power level of one or more selected co-channel base stations of neighboring cells of the cellular system, whereby the range of communications provided by said isolated base station is changed to a different finite value relative to that provided by the said co-channel base stations.
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Patent Agency Ranking
公开(公告)号：GB2396527A
公开(公告)日：2004-06-23
申请号：GB0229833
申请日：2002-12-20
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
Abstract: A method of reducing interference in a multi-mode electronic system comprising a number of electronic devices (255, 260, 265, 270,) operably coupled to a number of wireless devices (225, 230, 235, 240) includes the steps of identifying interference between at least one electronic device and at least one wireless device and negotiating between the electronic device and the wireless device to identify a procedure to reduce or remove the interference. An operating characteristic of one or more of the electronic devices or wireless devices is adjusted to reduce interference based on the procedure. When the method is applied to an automotive environment, the mechanism enables vehicular radio receivers to be able to reduce or remove the possibility of receiving interference from various electronic systems in a vehicle, or vice versa.
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公开(公告)号：GB2379588A
公开(公告)日：2003-03-12
申请号：GB0121979
申请日：2001-09-11
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN , SHAHAF MARK
Abstract: A method of encrypting information to be transmitted in a wireless communication system employing an encryption protocol that uses an encryption key, the method characterised by the steps of: ```combining an individual identifier (e.g. a layer-2 MAC identity) related to a transmission sender with a shared key related to a type of transmission to form a transmission encryption key; and ```encrypting a transmission using said transmission encryption key. The invention could be applied in an internet protocol (IP) data network, where the layer-3 source ID of a packet could be used as a key modifier in a transmission where the contents of the packet are encrypted. Furthermore, the shared key may relate to any type of transmission, such as an emergency group call, pre-emptive priority call, an encrypted broadcast call or any other mobile radio communication where encryption is used. The system is operable in a direct mode of operation (DMO) and the manner of combining the individual identifier with a shared key can be changed, the change being notified to other users of the shared key.
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公开(公告)号：GB2375460A
公开(公告)日：2002-11-13
申请号：GB0111317
申请日：2001-05-09
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
Abstract: A method of operation for use in a radio communications system coprising a cellular network of base stations and mobile units linked to such base stations, the method comprising the following steps, with respect to any base station operable to provide direct radio communication with mobile units linked thereto: i) detecting that a base station has become isolated from the system, and, in consequence, ii) changing relative to one another the output power level of said isolated base station and the output power level of one or more selected neighbouring base stations of the cellular system.
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39.发明专利
公开(公告)号：GB2362783B
公开(公告)日：2002-08-07
申请号：GB0012851
申请日：2000-05-26
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
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公开(公告)号：GB2362783A
公开(公告)日：2001-11-28
申请号：GB0012851
申请日：2000-05-26
Applicant: MOTOROLA INC
Inventor： CHATER-LEA DAVID JOHN
Abstract: In a mobile communications system in which mobile radio transmitters and receivers communicate through an infrastructure including base stations and switching networks, the infrastructure is arranged to recognise signal delays. In response to a delay situation a message is sent to the receiving mobile informing it of a synchronisation error. The message may indicate that a received frame has been lost, that resynchronisation is required when the next synchronisation sequence is transmitted or that there is a synchronisation lag of N frames. The infrastructure can also send a message to the transmitting mobile instructing it to send a new synchronisation sequence value. The infrastructure also adds a step to the Just-In-Time-Audio (JITA) algorithm to avoid any extra delay being introduced into the transmission stream until the next synchronisation sequence is available.
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